Index: firmware/App/Controllers/DGInterface.h
===================================================================
diff -u -rd39ef6232e746a4f2d425135208602670fae60bd -r954107454f4c5d4cfbdfaefda5cc1cd15b1e18ac
--- firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision d39ef6232e746a4f2d425135208602670fae60bd)
+++ firmware/App/Controllers/DGInterface.h	(.../DGInterface.h)	(revision 954107454f4c5d4cfbdfaefda5cc1cd15b1e18ac)
@@ -86,6 +86,7 @@
     U32  drainToVolumeML;                           ///< Drain to target volume in ml
     BOOL tareLoadCells;                             ///< Flag indicates to tare load cells or not
     BOOL rinseConcentrateLines;                     ///< Flag indicates to rinse concentrate lines or not
+    BOOL cmd;                                       ///< Flag indicates to start or stop the drain mode
 } DRAIN_RESERVOIR_CMD_PAYLOAD_T;
 
 /// DG command response data record structure.
@@ -141,7 +142,7 @@
 void cmdChangeDGValveSetting( DG_VALVE_SETTING_ID_T valveSettingID );
 void cmdStartDGFill( U32 fillToVolMl );
 void cmdStopDGFill( void );
-void cmdStartDGDrain( U32 drainToVolMl, BOOL tareLoadCell, BOOL rinse );
+void cmdStartDGDrain( U32 drainToVolMl, BOOL tareLoadCell, BOOL rinse, BOOL start );
 void cmdStartDGTrimmerHeater( void );
 void cmdStopDGTrimmerHeater( void );
 void cmdDGSampleWater( SAMPLE_WATER_CMD_T cmd );